16
American Dryer Corp.
450370 - 2
BURNER HIGH-LIMIT FAULT
– This routine monitors the
burner high-limit switch. If the switch opens during the cycle
while the heat is on, the dryer will display “Burner High-Limit
Fault” and will go into Fault Mode with a brief audio indication.
The Phase 7 non-coin microprocessor controller (computer)
will check the tumbler temperature. If the exhaust probe
temperature is above 100° F (38° C), the dryer will continue to
display “Burner High Limit Fault”, while the dryer cools by
running with no heat for 3 minutes or until the temperature
drops below 100° F (38° C). Once the exhaust probe
temperature is below 100° F (38° C), or the 3 minutes expire,
the Phase 7 non-coin microprocessor controller (computer) will
shut off all outputs and will remain in Fault Mode until the dryer
is addressed.
CHECK CONTROL BOARD FUSE #2
– This routine identifies
the opening of the main fuse (fuse 2) on the Phase 7 non-coin
microprocessor controller (computer) board. If the fuse has
opened, the Phase 7 non-coin microprocessor controller
(computer) will not allow a cycle to begin and will display a
“Check Control Board Fuse #2” condition. If the fuse has
opened after the cycle has begun, it will still trigger the check
main fuse fault. The dryer will shut off all outputs and will go
into Fault Mode with a brief audio indication.
CLEAN LINT
– This routine monitors the opening of the lint
drawer switch and compares the time between openings to
the Lint Cleaning Frequency Setting. This routine will first
prompt the user to clean lint before locking out the dryer. Once
the time between cleanings is equal to the Lint Cleaning
Frequency Setting, the display will prompt the user to clean
lint. The Lint Cleaning Frequency limits the amount of time the
dryer will run before the Phase 7 non-coin microprocessor
controller (computer) locks the dryer out for further use. If the
lint drawer is not cleaned within 2 hours of run time, the Phase
7 non-coin microprocessor controller (computer) will be locked
out.
EXHAUST HIGH-LIMIT FAULT
– This routine monitors the
tumbler safety over temperature switch. If the switch opens,
the dryer will display “Exhaust High-Limit Fault” and will go into
Fault Mode with a brief audio indication. If the tumbler
temperature is above 100° F (38° C) the dryer will continue to
display “Exhaust High-Limit Fault”, while the Phase 7 non-coin
microprocessor controller (computer) cools by running with no
heat for 3 minutes or until the temperature drops below 100° F
(38° C). Once the tumbler temperature is below 100° F (38°
C), or the 3 minutes expire, the Phase 7 non-coin
microprocessor controller (computer) will shut off all outputs
and will remain in Fault Mode until the dryer is addressed.
EXHAUST PROBE FAULT / AXIAL PROBE FAULT
– This
routine indicates a problem with the temperature sensor circuit.
This error will trigger an “Exhaust Probe Fault or Axial Probe
Fault” condition and will go into a Fault Mode with a brief audio
indication. The dryer will run with no heat for 3 minutes. Once
the 3 minutes expire, the Phase 7 non-coin microprocessor
controller (computer) will shut off all outputs and will remain in
Fault Mode until the dryer is addressed.
EXHAUST HIGH TEMP FAULT
– This error routine indicates
a problem with overheating. This error will initiate an “Exhaust
High Temp Fault” condition and will go into Fault Mode with a
brief audio indication. The Phase 7 non-coin microprocessor
controller (computer) determines this error by monitoring the
temperature sensor input to have a steady gradual increase in
temperature to a known upper limit (the limit typically is 20°
over the maximum allowed programmable set point). The dryer
will run with no heat for 3 minutes or until the temperature drops
below 100° F (38° C). Once the tumbler temperature is below
100° F (38° C), or 3 minutes expire, the Phase 7 non-coin
microprocessor controller (computer) will shut off all outputs
and remain in Fault Mode until the dryer is addressed.
LINT ACCESS OPEN
– Indicates the lint drawer is open and
needs to be closed.
MAIN DOOR OPENED
– Indicates the main door is open when
it should be closed.
MODEL ERROR, ENTER CORRECT MODEL
– This routine
monitors the inputs, such as the sail switch and gas valve.
Steam dryers do not use a sail switch or valve input, and an
electric dryer will not use a gas valve input. These signals
allow the Phase 7 non-coin microprocessor controller
(computer) to interpret what type of dryer it is controlling. The
Phase 7 non-coin microprocessor controller (computer)
determines what the expected dryer responses should be for
that specific heat type dryer. Anytime a model fault is detected,
the Phase 7 non-coin microprocessor controller (computer) will
interrupt the cycle and will display “Model Error, Enter Correct
Model–” and go into Fault Mode with a brief audio indication. If
the tumbler temperature is above 100° F (38° C) at the time of
the failure, the Phase 7 non-coin microprocessor controller
(computer) will continue to display “Model Error, Enter Correct
Model–” while the dryer cools by running with no heat for 3
minutes or until the temperature drops below 100° F (38° C).
Once the tumbler temperature is below 100° F (38° C), or the 3
minutes expire, the Phase 7 non-coin microprocessor controller
(computer) will shut off all outputs and will remain in Fault Mode
until the dryer is addressed.
NOTE:
If a model error occurs, the Phase 7 non-coin
microprocessor controller (computer) will always default to
the “gas” type for safety reasons. Also, the dryer will be
stopped and forced into a restart condition to reevaluate all
the expected responses.
ROTATION SENSOR FAULT
– This routine monitors the pulses
from the rotational sensor input. It basically times the dwell
between signals. If the time between the pulses exceeds
10-seconds, the Phase 7 non-coin microprocessor controller
(computer) will trigger a “Rotation Sensor Fault” condition and
will go into Fault Mode with a brief audio indication. Depending
on the model type, the dryer will run the fan with no heat for 3
minutes or until the temperature drops below 100° F (38° C)
for GAS REVERSING, ELECTRIC REVERSING and STEAM
REVERSING models. Once the tumbler temperature is below
100° F (38° C), or the 3 minutes expire, the Phase 7 non-coin
microprocessor controller (computer) will shut off all outputs
and remain in Fault Mode until the dryer is addressed. If the
dryer model is a GAS NON-REVERSING, ELECTRIC NON-
REVERSING or STEAM NON-REVERSING model, the Phase
7 non-coin microprocessor controller (computer) will
immediately shut off all outputs, regardless of the tumbler
temperature, and remain in Fault Mode until the dryer is
addressed.
